CC2540 TX Power

Edd Barker

Other Parts Discussed in Thread: CC2540

Hi All,

Is it possible to set the TX power of the CC2540 to less than -23dBm? As far as I can see the only 4 options are for -23, -6, 0 & 4.

Thanks in advance.

Edd

over 13 years ago

0 Chatto over 13 years ago

TI__Genius 12545 points

In the CC2540, the power is controlled by the stack. There are 4 set levels as mentioned by you. You could use attenuators to further reduce the output power. But remember, using external components to reduce output power will also hurt you on the receive side with reduced sensitivity.

Why do you need to be less than -23dBm?

0 Edd Barker over 13 years ago in reply to Chatto

Prodigy 40 points

Using the IC as a proximity device, I'm looking for it to alarm at a distance of about 5m. The -23dBm setting triggers at about the 10m mark.

0 Chatto over 13 years ago in reply to Edd Barker

TI__Genius 12545 points

You might be okay using an attenuator in this case to reduce the output power from the fob. As long as the base unit remains the receiver without any attenuation.

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CC2540 TX Power